No. 572] 



NOTES AND LITERATURE 



507 



get a worse agreement between observation and theory in 42 out 

 of every 100 random samples on which the point was tested. In 

 other words, the fit may be considered sufficiently good. As a 

 matter of fact, the fit is extraordinarily close over most of the 

 curve. Four (only) out of the 32 ordinates contribute more than 

 50 per cent, of the value of x 2 - 



TABLE I 



382 2.62 



It may be said, in conclusion, that Slutsky's contribution is 

 one which will be highly valued by all investigators who have a 

 critical interest in the graduation of observational data, whatever 

 the field in which they may be working. 



Raymond Pearl 



